November 30, 2011 (Otay Mesa)--A drug tunnel discovered Tuesday between Tijuana and San Diego was described by U.S. authorities as one of the most elaborate ever found beneath the U.S.—Mexico border. The passageway, the second major one uncovered in the past two weeks, connected a warehouse in Mexico to another in Otay Mesa.

“It’s one of the most sophisticated tunnels we’ve ever discovered,” said Lauren Mack, spokeswoman for U.S. Immigration and Customs Enforcement. "It’s got a number of features that were used to facilitate the smuggling." She said details of the tunnel’s construction would be forthcoming Wednesday.

This image provided by the San Diego Tunnel Task Force shows the entrance to a cross-border tunnel in Tijuana on Tuesday Nov. 29, 2011, the latest in a spate of secret passages found to smuggle drugs from Mexico.